I had one credit union which made two unauthorized debits of around $100 to my account. For those cases, the credit union immediately resolved the mistake when I reported it. For the case described in this credit.com article
, it took Wells Fargo several days to resolve an unauthorized debit of $6,000.
Have you had cases when your bank or credit union mistakenly withdrew money from your account? How long did it take for the bank to give full and permanent credit of the amount?